Overview

The Sigma MF 12mm f/8 Fisheye is a manual focus, fixed aperture lens offering a 180° field of view on full-frame. Optically, it is sharp in the center but soft at the edges, with moderate chromatic aberration and strong vignetting wide open. Build quality is basic but functional, with a lightweight plastic construction. It suits photographers seeking an affordable, compact fisheye for creative or experimental use, but not for critical edge-to-edge sharpness.